Motorola Whisper Bluetooth Headset Hz850 -With Crystaltalk DSP Noise Reduction Retractable boom with 4-mics and CrystalTalk Noise reduction by Active Noise Cancellation Up to 6 hours battery life of talk time and 12 days of standby time Operating range up to 300 feet (approximately) Multiuse connects to 2 Bluetooth devices at the same time